Add more debugging to getCA3LineDetails method

- Add debug logs to track method calls and return values
- Help diagnose why account details are not being found
- Track account count returned by getCA3LineDetails

core/class/declarationtva.class.php

@@ -1437,12 +1437,15 @@ class DeclarationTVA
      */
     public function getCA3LineDetails($declaration_id, $ca3_line)
     {
+        error_log("DEBUG: getCA3LineDetails called for declaration $declaration_id, line $ca3_line");
+        
         // Get declaration dates
         $sql = "SELECT start_date, end_date FROM " . MAIN_DB_PREFIX . "declarationtva_declarations 
                 WHERE rowid = " . (int)$declaration_id . " AND entity = " . $this->entity;
         
         $result = $this->db->query($sql);
         if (!$result || $this->db->num_rows($result) == 0) {
+            error_log("DEBUG: No declaration dates found for declaration $declaration_id");
             return array();
         }
         
@@ -1511,7 +1514,7 @@ class DeclarationTVA
             $calculated_line = $this->db->fetch_object($result_line);
         }
         
-        return array(
+        $result = array(
             'ca3_line' => $ca3_line,
             'declaration_id' => $declaration_id,
             'start_date' => $start_date,
@@ -1525,6 +1528,9 @@ class DeclarationTVA
             ),
             'account_count' => count($details)
         );
+        
+        error_log("DEBUG: getCA3LineDetails returning " . count($details) . " account details for line $ca3_line");
+        return $result;
     }
     
     /**